Sq-D Press. Swch, 30/50 w/Low Cut-Off

The Square-D Pressure Switch (FSG-2 M4) provides 30/50 PSI control with a low-pressure cut-off and is, in the manufacturer's words, the standard of the industry for controlling electrically driven water pumps. It automatically starts and stops the pump to maintain system pressure within the set range, while its built-in cut-off feature helps protect the pump from the damage that running dry can cause.

30/50 Control With Low Cut-Off

This switch is configured to turn the pump on at 30 PSI and off at 50 PSI, holding household water pressure within a comfortable, usable band. As you draw water and pressure falls toward 30 PSI, the switch closes its contacts and starts the pump; once demand stops and pressure climbs to 50 PSI, it opens the contacts and shuts the pump off. The integrated low-pressure cut-off adds an important layer of protection: if system pressure drops below a safe threshold, such as when a well runs low or the pump loses its prime, the switch shuts the pump down rather than letting it run dry, which can quickly overheat and damage a pump.

• Genuine Square-D pressure switch
• 30/50 PSI on and off pressure settings
• Built-in low-pressure cut-off for pump protection
• Controls electrically driven water pumps
• Industry-standard reliability for well and booster systems
• Trusted, widely used design

Pressure switches are core components of well-water and pressure-boosting systems, working hand in hand with a pressure tank to deliver steady, automatic flow throughout the home. The pressure tank stores water under pressure to reduce how often the pump cycles, while the switch dictates when the pump runs. Common symptoms of a failing switch include a pump that short-cycles rapidly, one that won't shut off, or one that fails to start at all, and in many cases replacing the switch resolves these issues. When installing, choose the correct pressure settings for your system, always disconnect power before wiring to avoid shock hazard, and make sure the contacts and the pressure-sensing tubing port are clean and unobstructed so the switch reads system pressure accurately. Verify proper on/off operation after installation. As a trusted, widely stocked control, this Square-D switch is the natural choice for keeping well and booster pump systems running smoothly with built-in protection against dry-running damage.